Okay, let’s tackle this. So Rajan Kumar has 25 years of experience as a self-employed individual, which is a significant amount of time. His location is Patna, Bihar, India, which is a relatively lower-cost location compared to major cities in the US or Europe. Considering his experience and location, his hourly rate would likely be lower than what professionals in similar roles in more expensive locations would charge. A rough estimate for a self-employed professional with 25 years of experience in a lower-cost location could be around $100-$150 per hour. Given the lack of specific industry or technical expertise, I'll estimate around $120 per hour.